replant-disease
Replant disease is a phenomenon where plants of the same species or family fail to thrive when grown repeatedly in the same soil, typically due to a buildup of soil-borne pathogens, nematodes, and microbial imbalances. It poses a significant challenge in orchard and crop management, as affected soils can suppress growth, reduce yields, and cause root damage even in otherwise healthy plants. Understanding the underlying biological and microbial mechanisms is essential for developing sustainable soil management strategies in perennial fruit and tree crop production.
open_in_new WikipediaPubMed · 2026-04-16
Peach trees poisoned by their own root compounds can recruit specialized soil bacteria to break down the toxin and activate their immune system, offering a biological solution to a widespread crop production problem.
Amygdalin accumulated progressively in rhizosphere soil with longer continuous peach cultivation, and its buildup was more damaging in sterilized soil, proving soil microbes provide natural protection.
Three bacterial strains isolated from amygdalin-stressed peach roots significantly reduced autotoxic damage, with their combined inoculation producing the greatest improvement in plant growth.
Microbe-mediated stress relief worked through jasmonic acid (JA) signaling: applying JA externally mimicked the bacteria's protective effect, and blocking the JA pathway cancelled the microbes' benefit.
